When Murota joined Hello Pro Kenshuusei, she was a second year middle school student. When she debuted in S/mileage, she was a first year high school student.[3] As of April 2016, she is currently attending her last year of high school.

The following list are notable friendships Murota Mizuki has acquired:

When asked what group she'd like to debut in, she answered Morning Musume. When asked again later, she said that her dream was to debut soon and have people remember her name and face, and she'd like to appear on Kouhaku as a famous idol.

Her Hello Pro Kenshuusei rival in dancing was Inaba Manaka, because she's so good that she actually learned from her, and her rival in singing was Danbara Ruru, because her voice is so beautiful that it brought her to tears.

Her favorite make-up brand is Chanel, but she also likes Yves Saint Laurent and Dior.[8]

Her favorite clothing brand is Cecil McBee and she recently likes Liz Lisa.[8]

In Fukuda Kanon's final interview before her graduation, she had this to say about Murota: "She’s sexy and mature. She has nice lines when she dances and I’m excited to see how she grows and develops."[11]